Yes, for mlx4 it is ignored. -----Original Message----- From: Ursula Braun [mailto:ubraun@xxxxxxxxxxxxxxxxxx] Sent: Thursday, March 9, 2017 3:54 AM To: Eli Cohen <eli@xxxxxxxxxxxx>; Matan Barak <matanb@xxxxxxxxxxxx> Cc: Saeed Mahameed <saeedm@xxxxxxxxxxxx>; Leon Romanovsky <leonro@xxxxxxxxxxxx>; linux-rdma@xxxxxxxxxxxxxxx Subject: Re: Fwd: mlx5_ib_post_send panic on s390x On 03/06/2017 02:08 PM, Eli Cohen wrote: >>> >>> The problem seems to be caused by the usage of plain memcpy in set_data_inl_seg(). >>> The address provided by SMC-code in struct ib_send_wr *wr is an >>> address belonging to an area mapped with the ib_dma_map_single() >>> call. On s390x those kind of addresses require extra access functions (see arch/s390/include/asm/io.h). >>> > > By definition, when you are posting a send request with inline, the address must be mapped to the cpu so plain memcpy should work. > In the past I run SMC-R with Connect X3 cards. The mlx4 driver does not seem to contain extra coding for IB_SEND_INLINE flag for ib_post_send. Does this mean for SMC-R to run on Connect X3 cards the IB_SEND_INLINE flag is ignored, and thus I needed the ib_dma_map_single() call for the area used with ib_post_send()? Does this mean I should stay away from the IB_SEND_INLINE flag, if I want to run the same SMC-R code with both, Connect X3 cards and Connect X4 cards? ��.n��������+%������w��{.n�����{���fk��ܨ}���Ơz�j:+v�����w����ޙ��&�)ߡ�a����z�ޗ���ݢj��w�f
